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Moumoujus

PLANT ASH.

Avoid

Plant ash is the alkaline residue derived from the combustion of plant material, typically exhibiting a pH range of 9 to 13. Specific forms, such as coconut shell ash, are recognized for their high porosity and carbon content, which confer properties for absorbing impurities. Historically, it has been used for its cleansing and antiseptic qualities.

Summary

Absorbent Cleansing Antiseptic

Science

Mechanism of Action

Plant ash exerts its effects primarily through its high alkalinity, impacting the skin's pH balance. Certain variants, like coconut shell ash, possess a highly porous structure and a carbon content of approximately 98%, enabling the absorption of impurities and toxins. Traditional applications highlight its detergent and antiseptic actions, with research suggesting a role in pH regulation for wound healing.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Its intrinsic high alkalinity, with a pH between 9 and 13, poses a significant formulation challenge by drastically increasing the overall pH of a product, potentially destabilizing formulations typically optimized for the skin's acidic mantle (pH 4.5-5.5). Furthermore, the variable composition, including potential heavy metal content dependent on the source material and combustion method, can compromise both stability and safety.

Conflicts

  • Acidic ingredients
  • Ingredients sensitive to high pH

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk High

The Cosmetic Ingredient Review (CIR) has not formally assessed 'Plant Ash' due to its status as a non-standard INCI ingredient name. Despite this, available data suggests a high potential for skin irritation and adverse reactions. Its inherent high alkalinity (pH 9-13) is a primary concern, as demonstrated by reports of generalized rash, burning, and fever in cases of topical application, attributed to its potassium hydroxyl content. In vitro research on wildfire ashes further indicates cytotoxicity to human skin cells at elevated concentrations, linked to particulate matter and dissolved metals. Additionally, the variability of plant sources raises concerns about potential heavy metal accumulation.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

Given its high alkalinity, significant irritation potential, lack of formal safety review, and absence of modern clinical efficacy, plant ash is generally unsuitable for precision skincare formulations.

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